4
()
4
(1,2)
(4,3)
4
(-1,-2)
2x - 3y + 4 = 0
4
4
(3,4) 3
4
4
4
()
4
(1,2)
(4,3)
4
(-1,-2)
2x - 3y + 4 = 0
4
4
(3,4) 3
4
4